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package systole.persistence.brokersDB;

import java.util.List;
import org.hibernate.Criteria;
import org.hibernate.HibernateException;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Restrictions;
import systole.domain.persons.Patient;
import systole.exceptions.ExceptionDAO;
import systole.persistence.FacadeDB;
import systole.persistence.brokersInterface.PatientSyncBroker;
import systole.synchronization.remote.entities.PatientRemote;

/**
 *
 * @author Juan Manuel
 */
public class PatientSyncBrokerDB extends BrokerDB implements PatientSyncBroker {

    public void savePatientRemote(PatientRemote patientRemote) throws ExceptionDAO {
        try {
            this.logger.logDebug("saving remote patient");
            Session currentSession = FacadeDB.getInstance().getCurrentSession();
            currentSession.save(patientRemote);
            this.logger.logDebug("remote patient saved");
        } catch (HibernateException e) {
            this.logger.logError("error on save patient remote, msg: " + e.getMessage());
            throw new ExceptionDAO("No se pudieron guardar los cambios", e.fillInStackTrace());
        }
    }

    public List<PatientRemote> getPatientsToUpdate() throws ExceptionDAO {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    public List<Patient> getPatientsToUpload() throws ExceptionDAO {
        try {
            this.logger.logDebug("getting patients to upload");
            Session currentSession = FacadeDB.getInstance().getCurrentSession();            
            String hql = "select p from PatientRemote pr right join pr.patient p where pr=null ";
            Query query = currentSession.createQuery(hql);
            @SuppressWarnings("unchecked")
            List<Patient> list = query.list();
            this.logger.logDebug("getting patients to upload");
            return list;
        } catch (HibernateException e) {
            this.logger.logError("error on get patients to upload, msg: " + e.getMessage());
            throw new ExceptionDAO("No se pudieron obtener los pacientes", e.fillInStackTrace());
        }
    }

    public int getLastRemotePatientIdSynchronized() throws ExceptionDAO {
         try {
            this.logger.logDebug("getting last remote patient sync");
            Session currentSession = FacadeDB.getInstance().getCurrentSession();
            Criteria criteria = currentSession.createCriteria(
                    PatientRemote.class).addOrder(Order.desc("remoteId")).setMaxResults(1);
            PatientRemote patientRemote = (PatientRemote) criteria.uniqueResult();
            this.logger.logDebug("get successfully");
            return (patientRemote != null ? patientRemote.getRemoteId() : -1);
        } catch (HibernateException e) {
            this.logger.logError("error on get last remote patient synchronized, msg: " + e.getMessage());
            throw new ExceptionDAO("No se pudieron obtener los pacientes", e.fillInStackTrace());
        }
    }

    public PatientRemote getPatientRemoteByPatient(Patient patient) throws ExceptionDAO {
        try {
            this.logger.logDebug("getting patient remote by local patient");
            Session currentSession = FacadeDB.getInstance().getCurrentSession();
            Criteria criteria = currentSession.createCriteria(
                    PatientRemote.class).add(Restrictions.eq("patient", patient)).setMaxResults(1);
            PatientRemote sportRemote = (PatientRemote) criteria.uniqueResult();
            this.logger.logDebug("get successfully");
            return sportRemote;
        } catch (HibernateException e) {
            this.logger.logError("error on get remote patient by patient, msg: " + e.getMessage());
            throw new ExceptionDAO("No se pudieron obtener los pacientes", e.fillInStackTrace());
        }
    }

    public Patient getPatientByRemoteId(int remoteId) throws ExceptionDAO {
         try {
            this.logger.logDebug("getting patient by remote id");
            Session currentSession = FacadeDB.getInstance().getCurrentSession();
            Criteria criteria = currentSession.createCriteria(
                    PatientRemote.class).add(Restrictions.eq("remoteId", remoteId)).setMaxResults(1);
            PatientRemote patientRemote = (PatientRemote) criteria.uniqueResult();
            this.logger.logDebug("get successfully");
            return (patientRemote != null ? patientRemote.getPatient() : null);
        } catch (HibernateException e) {
            this.logger.logError("error on get patient by remote id, msg: " + e.getMessage());
            throw new ExceptionDAO("No se pudieron obtener los pacientes", e.fillInStackTrace());
        }
    }
}
